Stapling device



Feb. 23, 1943. M. ABRAMS ET AL 2,312,142

STAPLING DEVICE Filed Jan. 8, 1941 "Patented Feb. 23, 1943 UNITED STATESPATENT OFFICE STAPLING DEVICE Morris Abrams and George Berger, Brooklyn,N. Y., assignors to Arrow Fastener, Inc., New York, N. Y., a-corporationof New York Application January 8, 1941, Serial No. 373,580

6 Claims. (Cl. 13)

is tov scribed, a staple magazine, and a cover hingedthereto andcarrying the combination driver and spring, the cover beingdepressibleto swing relative to the staple magazine for' driving thestaples.

Yet a further object of the present invention is staple magazine beingfurther provided with lm-= proved means to limit relative rotation therebetween.

Yet a further object of this invention is to provide a stapling deviceof the character described, comprising a base, a staple magazine pivotedthereto and normally retained in raised position by a spring interposedbetween the base and the staple magazine, a cover hinged to the staplemagazine and provided with spring means to swing the cover upwardlyrelative to the staple magazine, and driver means to drive the staplewhen the cover is depressed, to swing the staple magazine downwardlyrelative to the base, and the cover downwardly relative to the staplemagazine.

Yet a further object of this invention is to provide in a staplingdevice of the character described, means to prevent the spring whichmoves the cover relative to the staple magazine, frombeing fullycompressed'on a full downstroke of the cover.

Still another object of this invention is to provide a strong, durableand compact stapling device of the character described, which shall beand of which the scope of application will be indicated in the followingclaims.

In the accompanying drawing, in which is shown one of the variouspossible illustrative embodiments of this invention,

Fig. 1 is a side elevational view of a stapling device embodying theinvention, with parts broken away and in cross-section;

Fig. 2 is a cross-sectional view taken on line 22 of Fig. 1;

Fig. 3 is a perspective view of the staple magazine, with the innerguide member for the staples removed, and with parts broken away and inI cross-section;

relatively inexpensive to manufacture, comprise few and simple partswhichshall be easy to manipulate, and yet practical and efilcient to ahigh degree in use.

Other objects of this invention will in part be obvious and in parthereinafter pointed out.

The invention accordingly consists in the features of construction,combinations of elements, and arrangement of parts which will beexemplifled in the construction hereinafter descrlbed ibo Fig. 4 is aperspective view of the inner guide member for the staples, with partsbroken away and in cross-section;

Fig. 5 is a partial perspective view of the pushing device for thestaples; and

Fig. 6 is a cross-sectional view taken on line 6-6 of Fig. 3.

Referring now in detail to the drawing, I0 designates a stapling deviceembodying the invention, comprising generally of a base II, a staplemagazine I2, in which are housed staples l3, a staple pusher device I4for feeding the staples,-and a cover I6 pivoted to the staple magazineand carrying a cap I I,

The base ll carries on its upper face, a usual anvil at its forward end.At the rear end of a base I i are a pair of parallel, upwardly extendingwalls 22 formed with aligned bearing openings 23. The base H is formedwitha notch 24 on the underside thereof, and adjacent the rear endthereof, for the purpose hereinafter appear- Mounted on the Walls 22 andwithin the bearing openings 23, is a transverse pivot pin 25 on whichthe staple magazine [2 is pivotally mounted. The staple magazine l2 maybe made from sheet metal and comprises a bottom Wall 21 and parallel,vertical, upwardly extending, symmetrical side walls 28. The sidewalls28, are formed with longitudinal, inwardly curved channel portions 29extending to the rear ends of the walls 28, but terminating short of thefront ends of said side walls. The forward ends of the channels 29 areinclined upwardly and rearwardly, as at 30, for the purpose hereinafterappearing.

Extending inwardly toward each other, from the side walls 28 arealigned, front wall portions 32. The walls 32 form with the ends of thechannels 29 tapering guide grooves 34, for the purpose hereinafterappearing. The grooves 34 increase in width from the lower to the upperends thereof. The front walls 32 are preferably inclined upwardly andrearwardly about one degree, for the purpose hereinafter appearing.

At the rear ends of the side walls 28 are downwardly extending parallelears 36 formed with bearing openings 31 through which the pivot pin 25passes. The ears 36 are disposed between the side walls 22 and the baseThe side walls 28 are formed adjacent the upper edges thereof, andadjacent the rear ends thereof, with aligned bearing openings 38, forthe purpose hereinafter appearing. Said side walls 28 are furthermoreformed at their upper ends with aligned longitudinal cut-outs, groovesor notches 48 terminating short of the front and rear ends thereof. Theedges 4| of the side walls 28 disposed between the notches 48 and thefront walls 32 incline downwardly and forwardly, for the purposehereinafter appearing.

Extending outwardly from one side wall 28, just rearwardly of the rearend of a notch 48, is a projection 43, which engages a slot 11- in coverIE to limit the upward movement of the staple magazine 2.

The bottom wall 21 terminates short of the front walls 32 leaving aspace through which the staples may be driven. Mounted on the bottomwall 21. and between the side walls 28, is an inner guide member 58 forthe staples l3. The inner guide member 58 has a top wall 5|, parallel towall 21 and side walls 52, parallel to and spaced inwardly of the bottomportions of the side walls 28. The top wall 5| of the guide memher isspaced just below the channel portions of member I2. Said top wall 5| isfurthermore formed with downwardly-depressed tongues 54 cut from themetal thereof and contacting the wall 21, and riveted thereto by rivets55. The front end 56 of member 58 terminates short of the front walls32, by a distance sufficiently to permit one staple to be driven betweensaid front walls 32 and the front edge 56 of said inner guide member.

.The staple pusher member I4 is mounted on the inner guide member 58,and comprises a channel shaped member 51 slidably engaging the guidemember and made of sheet metal. same has a top wall 58 and side walls 59contacting the top wall 5| and side walls 52 of the inner guide member.Extending upwardly from the top wall 58 of said member 51, are threeparallel vertical tongues formed with through openings 6|. Extendingfrom the openings 6| is a rod 62 formed with projections 63 at itsforward end.

The rod 62 has an upwardly and downwardly curved handle portion 62a atits rear end. On the rod 62 is a coil compression spring 64 interposedbetween one of the tongues 88, and a projection 65 on the rod 82 justforwardly of the handle 82a formed by a compression of the metal,pressed out enough to hold the spring in position.

It will now be understood that the spring 54, presses the member 51forwardly and the latter in turn presses the frozen staples to alwayskeep a staple in driving position. Channels 28 retain the staples on theinner guide 58. Attached to the upper side of the base II, as by rivetIla, is a leaf spring H) contacting the underside of the staple magazineI2, to raise the same.

The cover l6 comprises parallel side walls 18 disposed on opposite sidesof the side walls 28, and a top wall 1|, inclined somewhat upwardly andforwardly, and front walls 12 being inwardly from the front ends of theside walls 18. The

The

side walls 18 are formed adjacent their rear ends with bearing openings15 to receive a pivot pin 16 passing through bearing openings 28 and thebearing openings 15. The cover I8 is thus pivoted to the staple magazinel2. One side wall 18 is formed with a vertical slot 11 through which theprojection 43 extends. The projection 43 and slot 11 serve to limitrelative rotation between the cover l6 and the staple magazine. Attachedto the underside of the top wall 1| of the cover, as by rivet 88, is acombination spring and driver member 8| made from a single elongatedpiece of spring metal and having a downwardly extending driver portion84, the side edges of which are disposed within the grooves 34, a topportion The portion 88 of member 8| serves as a spring to cause relativerotation between the cover and the staple magazine l2. When the cover isdepressed, the staple magazine |2 will move downwardly until it moves nofurther, and the cover will then move downwardly relative to the staplemagazine, and driver portion 84 of member 8| will drive the forwardmoststaple towards the anvil 28.

It will be noted that the tapering groove 34 permits variations in theangle of the driver portion 84 as the cover is depressed.

It will be further noted that the forward and downward inclination ofthe edges 4| will permit the cover to be fullydepressed until stopped bysaid edges. The cut-outs 48 permit the cover to be fullydepressed'without fully flattening the spring portion 88.

The cap I1 is attached to the front top portion of the cover by therivet 88 and has downwardly extending side Walls Ho and a; downwardlyextending front wall |1b.

It will be noted that there is only one projection 43 on one side wallof the staple'magazine, and it serves as a stop for the cover on itsreturn stroke. The reason for not having stops on both sides is thatshould faulty staples become stuck in a machine, it is an easy matter towedge something between the staple magazine or frame and the cover,thereby releasing the projection 43 from the slot 11 and permitting thecover to be swung upwardly all the Way, allowing complete access to theinside of the device for removing the faulty staples. If projections 43were made on opposite sides of the staple magazine, it would not be aneasy matter to release the cover from the staple magazine.

The bottom wall 21 of the frame or staple magazine |2 may be embossed orpressed upwardly at the openings which receive the rivets 55, toaccommodate the heads of the rivets, so that the rivet heads will notproject below the underside of said Wall 21.

It will be noted that the base comprises a front portion ||b having araised wall He carrying the anvil, and downwardly extending, outwardlyinclined, side and front walls I he and Id. The wall He is slightlyinclined upwardly and forwardly, as shown in Fig. l of the drawing.Extending from the rear end of said wall I la is a rearwardly anddownwardly inclined interconn tin p rtion Hi. from which there extendsrearwardly, a flat, horizontal, bottom wall portion llg, from which theside walls 22 extend upwardly.

It will be noted that the spring llb is attached at Ila to the wall Ilg. Since the end at which the spring is anchored is below the top wallHe, said spring will not be fully compressed during the staplingoperation.

The rear end of wall lly terminates short of the rear ends of said walls22 to form the cut-out or notch 24, to permit the staple magazine andcover to be swung back and used as a tacker in the well known manner.

It will thus be seen that there is provided a device in which theseveral objects of this invention are achieved, and which is welladapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention,and as various changes might be made in the embodiment above set forth,it is to be understood that all matter herein set forth or shown in theaccompanying drawing is to be interpreted as illustrative and not in alimiting sense.

Having thus described our invention, we claim as new and desire tosecure by Letters Patent:

1. In a stapling device, a staple magazine comprising a bottom wall andupwardly extending side walls, said side walls being formed withlongitudinally extending inwardly projecting channels and inwardly bentfront walls, the front ends of the channels terminating short of saidfront walls and forming guide grooves therewith, a cover-having sidewalls, a top wall and pivoted to the staple magazine, the side walls ofthe cover being disposed on the outer sides of the side walls of thestaple magazine, the side walls of the staple magazine havinglongitudinal cut-outs in the upper edges thereof; a combina-' tiondriver and spring member attached to the underside of the top wall ofthe cover and having at one end a downwardly extending driver armreceived within said guide grooves and at the other end a rearwardly anddownwardly in clined spring arm engaged within the cut-outs in the sidewalls of the staple magazine.

2. In a stapling device, a staple magazine comprising a bottom wall andupwardly extending side walls, said side walls being formed withlongitudinally extending inwardly projecting channels and inwardly bentfront walls, the front ends of the channels terminating short of saidfront walls and forming guide grooves therewith,

a cover having side walls, a top wall, and pivoted to the staplemagazine, the side walls of the cover being disposed on the outer sidesof the side walls of the staple magazine, the side walls of the staplemagazine having longitudinal cut-outsin the upper edges thereof, acombination driver and spring member attached to the underside of thetop wall of the cover and having at one end a downwardly extendingdriver arm received within said guide grooves and at the other end arearwardly and downwardly inclined spring arm engaged within thecut-outs in the side walls of the staple magazine, one side wall of thecover being formed with a slot, and a projection on a side wall of thestaple magazine received within said slot.

3. In a stapling device, a staple magazine comprising a bottom wall andupwardly extending side walls, said side walls being formed withlongitudinally extending inwardly projecting channels, and inwardlybentfront walls, th front ends of the channels terminating short of saidfront walls and forming guide grooves therewith, a cover having sidewalls, a top wall and pivoted to the staple magazine, the side walls ofthe cover being disposed on the outer sides of the side walls of thestaple magazine, the side walls of the staple magazine havinglongitudinal cut-outs in the upper edges thereof, a combination driverand spring member attached to the underside of the top wall of the coverand having at one end a downwardly extending driver arm received withinsaid guide grooves, and at the other end a rearwardly and downwardlyinclined spring arm engaged within the cut-outs in the side walls of thestaple magazine, one side wall of the cover being formed with a slot,and

a projection on a side wall of the staple maga-" zine received withinsaid slot, said guide grooves increasing in width from the lower to theupper ends thereof.

4. In a stapling device, a staple magazine comprising a bottom wall andupwardly extending side walls, said side walls being formed withlongitudinally extending inwardly projecting channels and inwardly bentfront walls, the front ends of the channels terminating short of saidfront walls and forming guide grooves therewith, a cover having sidewalls, a top wall and pivoted to the staple magazine, the side walls ofthe cover being disposed on the outer sides of the side walls of thestaple magazine, the side walls of the staple magazine havinglongitudinal cutouts in the upper edges thereof, a combination driverand spring member attached to the underside of the top wall of the'cover and having at one end a downwardly extending driver arm.

received within said guide grooves, at the other end a rearwardly anddownwardly inclined spring arm engaged within the cut-outs in the sidewalls of the staple magazine, a side wall of the cover being formed witha slot, and a projection on a side wall of the staple magazine receivedwithin said slot, said guide grooves increasing in width from the lowerto the upper ends thereof, the front wall of said staple magazine beingin clinedupwardly and rearwardly.

5. In a stapling device, a staple magazine comprising a member having abottom wall and side walls extending upwardly from said bottom wall,

and walls extending inwardly from the front endsof the side walls andforming a front wall, said side walls being formed with longitudinalchannels, the front ends of the channels terminating short of the front,wall to form grooves therewith, an inner staple guide member attached tothe bottom wall and between the side Walls, said channels serving to.retain the staples on the inner guide member, a cover pivoted to saidside walls adjacent the rear ends thereof, and a plunger on said coverand engaging within said grooves.

6. In a stapling device, a staple magazine comprising a bottom wall andupwardly extending side walls, said side walls being formed withlongitudinally extending inwardly projecting chan-v rearwardly anddownwardly inclined spring arm .engaged with the staple magazine.

MORRIS ABRAMS. GEORGE BERGER.

